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x86: increase MAX_APICS for very large x86-64 configs

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Increase the maximum number of apics when running very large
configurations. This patch has no affect on most systems.

The patch has no effect on any 32-bit kernel. It adds ~4k to the size
of 64-bit kernels but only if NR_CPUS > 255.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jack Steiner 2008-06-16 12:09:10 -05:00 committed by Ingo Molnar
parent b6df1b8bc1
commit ab9c0bb8a8
1 changed files with 5 additions and 4 deletions
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9
include/asm-x86/mpspec_def.h
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@ -17,10 +17,11 @@
# define MAX_MPC_ENTRY 1024
# define MAX_APICS 256
#else
/*
* A maximum of 255 APICs with the current APIC ID architecture.
*/
# define MAX_APICS 255
# if NR_CPUS <= 255
# define MAX_APICS 255
# else
# define MAX_APICS 32768
# endif
#endif
struct intel_mp_floating {